Valve.



A. L. DELVAUX. VALVE.

APPLICATION FILED JA 15I.28, 1913.

1,062,144. Patented May'20, 1913 Attorheys ARTHUR L. DELVAUX,CHAMIPAIGN, ILLINOIS.

VALVE.

Specification of Letters Patent.

Application filed January 218, 1913. Serial No. 744,776.

To all whom it may concern:

Be it known that I, ARTHUR a specification.

This invention relates to safety valves and more articularly to oneadapted to be used upon ocomotives. An object of cured thereto.

A further object is .to provide a valve? which may be easily and readilytaken apart and the valve seat and head plates renewedg With theforegoing and other objects in view which will appear as thedescriptionproceeds, the invention resides in the combinatlon andarrangement of parts and in the detail of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

Figure 1 1s a cross sectional view in ele-i vation'of my improved valve.-Fig. 2 is a top view thereof'in, which the valve cap has been removed.Fig. 3 is an enlarged fragmental view showing the manner in which acushion is formed between the valve and the valve seat. 1

Referring to the drawings in which similar reference numerals designatecorresponding parts throughout the several views, 1 is a circular valvecasing provided with a cylindrical bore 2 extending partiallytherethrough, the said bore 2- being internally threaded as at 3, at itslower extremity. The upper portion of the casing is enlarged andcomprises a valve chamber-4 which is an enlarged extension of thecylindrical bore 2. The upper portion of the valve casing 1 is providedwith the internal threads 5 to which is secured theflvalve cap,generally designated by the numeral 6.

Theflat shoulder between the cylindrical bores 2 and 4 is provided withan annular rim 7 extending upwardly therefrom which rim is externallythreaded as at 8 and upon the present invention is to provide a safetyvalve having a flat valvei seat and head wit-h detachable seat platessel the upper surface of the said rim 7 aredis- L. DnLvAUx, a citizen ofthe United States, residing at Champaign, in the county of Champaign;and State of Illinois, have invented a new and useful Valve, of whichthe following is posed a plurality of detachable seat plates 9 securelyheld in place by means of the ring 10 which ring 10 is provided with thedependlng cylindrical flange 11 threadedly engaging the rim 7. In orderthat the ring PatentedMayZO, 1913.

10 and flangefll depending therefrom which constitutes means for holdingthe valve seat plates 9 in position, may be easily and readily unscrewedfrom the rim 7, the projecting lugs 11 are formed on the outer peripherythereof and are such as may be readily engaged by the use of a spannerwrench.

The valve head 12 is composed of the two cylindrical plates of differentdiameters and projecting from the lower plate or portion of the valvehead is the cylindrical valve stem 13 which is externally threaded andto i which is secured the .upper portion of the spider 14. The spider 14is of the usual construction and is adapted to slidablyengage the sidewalls of the bore 2 and insure the proper seating of the valvehead.Disposed between the spider 14 and the valve head 12 are a plurality ofvalve head plates 19 which are detaehably secured therebetween. In order that the spider 14 may be removed from the valve stem 13 to therebyallow for. the renewing of the valve head plate 19 the upper portion ofthe spider is provided with a wrench engageable surface as at 15. In

order that the valve head may. be engaged by a wrench a hexagonal recess16 is provided, it being understood that the said recess may be of anywrench-en ageable configuration. A second recess 17 is provided in thevalve head in which is positioned the lower extremity of the valvespring 18. v

The valve cap, generally designated by the numeral 6 comprises thecircular plate 20 which threadedly engages the upper portion of thevalve casing 1 and is provided with the apertures 21 therein. A housing22 is provided and may be of any length to accommodate the valve spring18. The upper portion of the housing is provided with the apertures 25therein and preferably located centrally of the upper portion ofthe saidhousing is the .bolt 23 or similar means whereby the length of thespring 18 may be varied by which it will be understood that the pressureat which the valve head will be raised from the seat may be adjusted. p

From the foregoing'it will be understood that the threads 3 of thecasing 1 are designed to engage a pipe or suitable threaded membercommunicating with the boiler or pressure supply. Pressure will passreadily through the cylindrical bore 2 beyond the spider 14 and actdirectly against the valve head tending to raise the latter. By reasonof the spring 18, the pressure at which the valve head will raise andallow for the escape for the pressure may be adjusted.

From the foregoing it will be apparent that I have devised a valve ofsimple construction and one which is adapted to be readily taken apartand in which the valve seat and head plates are flat and which willtherefore be subject to little or no wear. Furthermore should the valveand head plate become corroded or faulty and it is desired to replacethe same, this may be accomplished by removing the cap 6 and the spring18 therewith. The valve head and spider may be readily withdrawn fromthe valve casing and by means of two wrenches the spider may be removedfrom the valve head and thevalve head plates 19 removed and new onessubstituted therefor. By a re- .moval of the ring 10 and dependingflange 11, the valve seat plates 9 may be removed and new onessubstituted therefor. From which it will be apparent that the valve maybe easily maintained in an operative condition and furthermore by reasonof the flat surfaces of the valve head and seat there will be nolikelihood of the valve becoming wedged or jammed as often happens withsafety valves provided with conical seats, this being an important itemand one which will be readily appreciated by those familiar with theart.

As more clearly illustrated in Fig. 3, the valve head 12 is providedwith the recess 26 therein and the ring 10 is also cut away with theresult that a cushion chamber 27 is formed immediately before valve seatwith the result that any and all knocking is eliminated. Furthermore bythe forming of the recess in the valve head as shown, when the valveopens to a slight extent the steam or fluid escaping therethrough willstrike against the valve head with the result that the said valve willbe thrown wide open and the pressure thereby immediately relieved.

Having thus fully disclosed my invention, what I claim to be new andoriginal with me is 1., A valve comprising a casing provided with acylindrical chamber therein, and a cylindrical bore communicatingtherewith, a valve seat secured within said chamber, a plurality of flatvalve seat plates positioned thereon, means for holding said valve seatplates in position, a valve head, a valve stem secured thereto, a spidersecured to said valve stem and slidably engaging the side walls of saidcylindrical bore, a plurality of valve head plates disposed between saidspii,oe2,144

der and said valve head, a cap secured to said casingat the upperextremity thereof, resilient means disposed between said valve head andsaid cap adapted to maintain said valve head in a seated position.

2. In a valve of the character described the combination of, a casingprovided with a valve chamber provided with a cylindricalborecommunicating therewith, an upstanding valve seat disposed withinsaid chamber, a plurality of valve seat plates secured upon the upperextremity thereof, means for holding said valve seat plates in positionthereon, a valve head disposed within said cylindrical chamber, a valvestem depending therefrom, a spider slidably engaging the side walls ofsaid cylindrical bore secured to said valve stem, a plurality of valvehead plates disposed between and held in position by said valve head andsaid spider, said valve head provided with a wrench-engageable recesstherein, said spider provided with a wrench-engageable surface thereon,a I

,cap secured to the upper extremity of said valve casing, a compressionspring disposed between said cap and said valve head.

3. In a valve of the character described, a casing provided with acylindrical valve chamber therein and with a cylindrical borecommunicating therewith, a valve seat disposed within said cylindricalchamber and externally threaded, a purality of valve seat platespositioned upon the upper surface of the valve seat, a ring providedwith a depending flange extending therefrom threadedly engaging saidvalve seat and adapted to secure said valve seat plates in position, avalve head, a valve stem extending therefrom, said valve stem externallythreaded, a spider slidably engaging the side walls of said cylindricalbore and threadedly engaging said valve stem, a plurality of valve headplates secured between said valve head and said spider, said valve headand said spider provided with wrench engaging surfaces, a cap threadedlyengaging the upper portion of said valve casing, a compression springdisposed within said cap and contacting with said valve head, meanssecured to the upper portion of said cap to vary the compression of saidspring.

4. A pressure safety valve comprising a casing, said casing providedwith a cylindrical valve chamber therein, and with a cylindrical borecommunicating therewith, an upstanding rim disposed within said valvechamber, said rim provided with external threads thereon, a plurality ofvalve seat plates positioned upon the upper extremity of said rim, aring provided with a depending cylindrical flange therefrom threadedlyengaging said rim and adapted to secure said valve seat plates inposition, a valve head comprising two cylindrical plates of differentdiameters, the upper of said plates provided with a wrench engagingrecess therein, and provided with a nut engaging and spring engagingrecess therein, said lower plate provided with a threaded valve stemextending therefrom, a spider threadedly secured to said valve stem andslidably engaging the side walls of said cylindrical bore, a pluralityof valve head plates disposed between said spider and said lower plateof said valve head, a valve cap threadedly engaging the upper portion ofsaid valve casing and provided with a spring housing extending upwardlytherefrom, a spring disposed within said housing and contacting withsaid valve head, means to vary the compression of said spring, said capprovided with apertures therein.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

ARTHUR L. DELVAUX.

Witnesses: 1

JAMES S. HANsHAN, ROBERT NELSON THURMOND.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

